Speed-governor.



PATENTED DEC. 12, 1905.

0. W. ROBBINS.

SPEED GOVERNOR.

APPLICATION FILED MAY 27. 1905.

2 SHEETS-SHEET 1.

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dmwmh I 13L H PATENTED DEC. 12, 1905.

0. W. ROBBINS.

SPEED GOVERNOR.

APPLICATION FILED MAY 27. 1905.

2 SHEETS--SHEET 2.

. AZ/omey UNITED STATES PATENT OFF CE.

Specification of Letters Patent.

' Patented Dec. 12, 1905.

Application filed May 27, 1905- Serial NO- 262,665

To all whom, it may concern:

Be it known that I, OLOVER W. ROBBINS, a citizen of the United States,residing at Burleson, in the county of Johnson and State of Texas, haveinvented new and useful Improvements in Speed-Governors, of which thefollowing is a specification.

My invention is a speed-governor, and has for its object to provide agovernor in which friction is reduced to a minimum and which issensitive and reliable in operation.

To this end the invention consists in certain novel features ofconstruction hereinafter described and claimed.

In the accompanying drawings, Figure l is an elevation of the governor.Fig. 2 is a vertical section on the line 2 2 of Fig, 1. Fig. 3 is an endelevation. Fig. 4 is a sectional detai Referring specifically to thedrawings, 10 denotes-a casing which contains a rotary valve 11,controlling the supply of steam or other motivefluid to the engine. Theinlet-pipe is indicated at 12 and the outlet-pipe at 13. A pair of arms.14 extend from the valve-casing and are provided with bearings 15. Thearms can be cast integral with the valve-casing, or

they may be bolted thereto. The valve-stem 16 is fitted with a crank17,which is joined by a connecting-rod 18 to one arm 19 0f a bellcranklever, which is fulcrumed, as at 20, on a support 21, rising from one ofthe arms 14. The other arm 22 of the bell-crank lever is forkedtransversely,'as at 23, and its branches extend into a groove 24 in asleeve 25, which is slidably mounted on a shaft 26, journaled in thebearings 15. The sleeve is prevented from rotating on the shaft by afeather or other suitable means. Longitudinal movement of the sleeve onthe shaft operates the valve through the connections just described.

Adjacent the sleeve 25 is asleeve 27, which is fastened on the shaft 26and carries a pin 28, on which a small toothed wheel 29 is mounted. Thiswheel has a projecting forked arm 30, which is joined by aconnecting-rod 31 to the sleeve 25, whereby the latter sleeve is causedto slide lengthwise on the shaft 26 when the wheel 29 is rotated.

At 32 is indicated a wheel which is loose on the shaft 26. Teeth 33 arecut in the hub 34 of this wheel on one side thereof, which teeth meshwith those on the wheel 29. Adjacent the wheel 32 is a cross-bar 34,which is made fast to the shaft 26 by a set-screw 35 or other suitablemeans. The outer ends of the cross- 'flattened sides of the sleeves 37.The tension of the springs is regulated by set-screws 43, which arethreaded through brackets 44, secured to the rim 41. As stated, theperipheries of the sleeves 37 are flattened or made cam-shaped, as at40, so thatthe pressure of the springs 42 thereagainst tends to resistthe turn of the sleeve, and consequently the outward movement of thegovernor-weights. The arms 38 are connected by slotted links 45 to theWheel 32, preferably the spokes thereof, for a purpose to be hereinafterstated.

The operation of the governor is as follows: The wheel 32, althoughloose on the shaft 26, rotates therewith by reason of the links 45connecting it to the governor-weights, which in turn are carried by thecross-bar 34, the latter being made fast to the shaft. When inconsequence of the speed of the engine the governor weights flyoutwardly beyond a predetermined point by reason of the centrifugalforce, they. pull the wheel 32 around on its axisthat is, they vary therelative angularity of the cross-bar 34 and the wheel 32 and cause thewheel to creep or move around on the shaft. This creeping or movement ofthe wheel through the gears 33 and 29 turns the latter gear and bymovement of the connecting-rod 31 causes the sleeve 25 to slidelengthwise on the shaft 26, which by reason of the connectionsheretofore described operates the valve 11 to decrease the steam-supply.When the speed of the engine is lowered, the governor-weights returntoward their normal position, being assisted in this by the pressure ofthe springs 42 on the cam-surfaces of the sleeve 37, whereby the wheel32 is pulled back and the valve is operated to increase the steam-supplythrough the gearing and connections just described.

The wheel 32 will preferably be made ballbearing, so as to be sensitivein responding to the pull of the governorweights. The cones 46 for theballs 47 are on the sleeve 27 and the cross-bar 34.

The speed at which the governing mechanism acts can be controlled byadjustment of the sleeve lengthwise on the shaft 26. This is readilydone by loosening the set-screw 35 and turning the cross-bar 34 andwheel 32 on the shaft 26.

A belt-wheel 48 imparts motion to the shaft 26.

Having thus described my invention, what is claimed as new, and desiredto be secured by Letters Patent, is

1. Y A speed-governor comprising a shaft; a member made fast to theshaft, and carrying governor-weights; a member loosely mounted on theshaft,,and connected to the governor-weights and rotatable thereby; anda gearing and connection between said loose member and thegovernor-valve.

2. A speed-governor comprising a shaft; a

member made fast to the shaft, and carrying governor-Weights; a memberloosely mounted on the shaft, and connected to the governor-weights androtatable thereby; a sleeve slidable lengthwise on the shaft, and havinga connection with the governor-valve; and a gearing and connectionbetween the loose member and the sleeve.

3. A speed-governor comprising a shaft; a

- member made fast to the shaft, and carrying governor-weights; a memberloosely mounted on the shaft, and connected to the governor-weights, andhaving a gear; a sleeve slidable lengthwise on the shaft, and havingaconnection with the governor-valve; a sleeve fast on the shaft; agear-wheel carried by the latter sleeve, and meshing with the gear onthe loose member; and a connection between said gear-wheel and theslidable sleeve.

4:. A speed-governor comprising a shaft; a member made fast to the shaftand carrying projecting pins; cam-sleeves mounted on the pins; weightedarms extending outwardly from the sleeves; a member loosely mounted onthe shaft, and connected to the weighted arms; a gearing and connectionsbetween said loose member and the governor-valve; and springs secured tothe loose member, and bearing on the cams of the aforesaid sleeves.

5. A speed-governorcomprisinga rotatable shaft; a fast and a loosemember on the shaft;

centrifugally-operated means to vary the relative angularity of saidmembers by turning the loose member on the shaft with respect to thefast one; and gearing and connection between the loose member and thegovernorvalve.

6. A speed-governor comprising a fast and a loose member on the shaft;centrifugallyoperated means to vary the relative angularity of saidmember by turning the loose member on the shaft, with respect to thefast member; a gear on the loose member; a sleeve slidable lengthwise onthe shaft, and having a connection with the governor-valve; a sleevefast on the shaft; 2. gear-wheel carried by the latter sleeve, andmeshing with the gear on the loose member; and connection between saidgear-Wheel and the slidable sleeve.

In testimony whereofI have signed my name to this specification in thepresence of two subscribing witnesses.

- OLOVER W. ROBBINS. Witnesses:

W. J. ROBINSON, R. O. NEUSOM.

